That's a horribly mean thing to say...and obviously said without thinking of anyone but herself...and getting a cheap laugh...BUT...just know that it was probably just a thoughtless joke, not meant to cut you so deep...and it probably wasn't done with malicious intent either. It's not really what was said that is the biggest problem, but more so how it made you feel..so maybe talk to this SO called friend...let her know how you feel..and what it did...maybe talking it through will help with not wanting to slice yourself up...

but i can understand how you think that is going to help...and it most probably will for the short term but that memory is going to stay with you until you deal with it...

just a thought... :-)...

hope you will be ok...